why ibv_wc src_qp is zero

Hi all,
Does anyone know the usage of the src_qp field in struct ibv_wc?

I’m using RC transport type with only Send Operation on Send Queue.
On the requester side, when SQ WR is finished, there’s one WCE is on CQ. ibv_wc::src_qp is checked with zero value. On the responder side, when RQ WR is finished, there’s one WCE is on CQ. ibv_wc::src_qp is checked with zero value too.
Why the ibv_wc::src_qp field is zero instead of recording the peer's qp number?

Quoted 7 lines · Changcheng

Hi all,
Does anyone know the usage of the src_qp field in struct ibv_wc?

I’m using RC transport type with only Send Operation on Send Queue.
On the requester side, when SQ WR is finished, there’s one WCE is on CQ. ibv_wc::src_qp is checked with zero value. On the responder side, when RQ WR is finished, there’s one WCE is on CQ. ibv_wc::src_qp is checked with zero value too.
Why the ibv_wc::src_qp field is zero instead of recording the peer's qp number?

It is only supported for UD QPs

Jason